Manfred Rouhs, treasurer of the Pro Cologne movement and former candidate of the German League for People and Homeland and the National Democratic Party of Germany, was elected its first chairman.

On 25 July, three days after the Norway attacks, Pro Germany supporters gathered for a "silent vigil" in front of the Norwegian embassy.

The far-right publisher Manfred Rouhs and the lawyer Markus Beisicht have been active in the association from its start.

When the municipality planned to erect a mosque in Cologne's Chorweiler district, the citizen's movement organised a collection of signatures petitioning against the project.

They were able to present 28,000 signatures against any mosque construction site in Cologne to the committee on petitions only shortly before the 2004 local elections.

With the tailwinds from the signatures campaign, the voter's association was able to win 4.7% of the votes and four seats in the Cologne city council.

In September 2008, Pro Cologne organised the Anti-Islamisation Congress,[14] inviting Mario Borghezio and Filip Dewinter among others.

In October 2005, Pro Cologne filed a suit against the state to get the mention of the party removed from the annual report.

Thereupon the Higher Administrative Court has ruled that there are sufficient factual indications for the suspicions, that justify the observation and mention in the report.

He sees ethnonationalist and racist as well as antisemitic strands, authoritarian ideas and the rejection of equality and discrimination of minorities in activities of pro Germany, particularly the campaigning against multiculturalism, building of mosques and minarets.